Most of the verified Pantera parts vendors WILL NOT sell struts that measure over 100 lbs due to the likelihood of warping the roof where the hinges bolt on. If your decklid needs more than 100 lbs from each strut, use a strut-lock on one rod rather than a lift that can wreck the body. FWIW, the roof area is probably the least easy area to fix of the whole car- by anyone.
Pantera-Pat, the stock struts had a boot and a raised portion of the strut. The boot was loose-fitting and water ran down the rod under the boot & collected at the raised part. Then it rusted. So, many old-timers started installing stock struts upside-down to preserve the strut seals. With the Chinese gas struts used nowadays and their more rounded seal ends, there's no particular advantage to mounting upside-down but the early mount is widely copied anyway. FWIW, the rod end unscrews on most, if you have blade-type (Hall) ends and need heim-joint ends.